구한말 대표적인 항일 의병장인 운강 이강년(雲岡李康秊, 1858-1908)이 남긴 시문 등이 포함된 유고 1권과, 사후 제천지역 의병들이 그의 의병활동 등을 기록한 부록 3권으로 구성된 필사본 3책이다. 이강년은 을미사변 시 고향인 경상북도 문경에서 창의(倡義)하여 충청북도 제천 등지에서 의병활동을 벌였고, 군대해산 후 의병을 재건하여 충청~강원의 산악지대를 넘나들며 일본군을 상대로 군사 활동을 전개하다 붙잡혀 1908년 10월 13일 서대문감옥에서 순국하였다. 정부에서는 고인의 공훈을 기리기 위하여 1962년 건국훈장 대한민국장을 추서하였다.
The Documents of Lee Gang-nyeon (pen-name: Ungang, 1858-1908), a major righteous army commander of the late Joseon period, include a book of his literary works, and an appendix consisting of three volumes of manuscripts. The latter contains records of Lee’s military activities that were written after his death by soldiers of the righteous army from the Jecheon area. Lee Gang-nyeon raised a righteous army in his hometown of Mungyeong, Gyeongsangbuk-do province in response to the Eulmi Incident of 1895, in which Japanese assassins murdered Empress Myeongseong, and was active militarily in Jecheon and other parts of Chungcheongbuk-do province. After the army was disbanded by the Imperial Japanese, he reformed and commanded it as part of the anti-Japanese resistance movement in the mountainous regions of Chungcheong and Gangwon regions. However, Lee was eventually arrested and incarcerated in Seodaemun Prison, Seoul, where he died on October 13, 1908. The government of South Korea posthumously awarded him the Republic of Korea Medal of the Order of Merit for National Foundation to commemorate his distinguished service in 1962.